You've nailed part a. I think a statement such as "The elements are in the second row of the matrix A with order 2 x 2." is precisely what the problem is asking for. For part b, you've got the right idea, but not the correct details. It's not the second column, but the _______ column.

For part c, i=j by no means forces i to equal 1. What if i=j=2? So which matrix elements are those?

You've nailed part a. I think a statement such as "The elements are in the second row of the matrix A with order 2 x 2." is precisely what the problem is asking for. For part b, you've got the right idea, but not the correct details. It's not the second column, but the _______ column.

Oh, yes. Of course, it's the first column. My head must be somewhere, but not with me.

For part c, i=j by no means forces i to equal 1. What if i=j=2? So which matrix elements are those?

You're right. My presumption was false.

and because .

The position of the elements would be: "the row and column where the value of the row index equals the column index."
After writing it down it makes much more sense to me.

Everything looks good. There is a name for the elements described by part c: the main diagonal. I think that's what the problem is after there.

OK.

Sorry for bothering you about this, but my Math book had no "Solutions"-part, where I could easily have looked it up.
Thanks again, Ackbeet, for your valuable help and enormous patience over me. I would really consider donating you money for your help, but I think I have to put that on my Someday list, because I'm a poor student from Paraguay.
The advice for writing things down is an excellent one, which I'll must keep in mind, but it was essentially part of the exercise.